Engine.



E. RATHBUN.

ENGINE.

APPLIUATION FILED JULY 5, 1912,

Patented Sept. 23, 1913.

5 l )C z nan o QQ/ffy? EDT/VARI) RATHBUN, 0F TOLEDO, OHIO.

ENGINE.

Original application filed May 29, 1908, Serial No. 435,779.

Specification of Letters Patent.

lfatented Sept. 23, ,1.913.

Divided and this application filed July 5, 1912.

Serial No. 707,840.

i o all whom ff' 15 may concern.'

Be it known that I, EDWARD Rari-uson, a citizen of the United States oi America, and a resident oit Toledo, county ot Lucas, and State of Ohio, have invented certain new and useful. Improvements in Engines, ot which the following is a specification.

My invention relates to the jackets oit gas engines and other engines, requiring cooling of their cylinders, and comprises an engine cylinder, particularly a substantially horizon tal engine cylinder, having a cylinder' jacket divided horizontally into a plurality ot compartments, at different levels respectively, and a head jacket, all connected in such manner as to receive the cooling fluid successively, as hereinafter described.

In the water cooling of the cylinders ot large gas engines and the like, having cylinder jackets and head jackets (which are usually directly connected) considerable dittticulty is experienced from too high temperature of the water in the head jacket; and, in the case of large horizontal cylinders, since the jacket water at the top of the cylinder will obviously be much warmer than that at the bottom, when the cylinder jacket is in one compartment only, as is usual, there is considerable difference in temperature bctween lthe top and the bottom of the cylinder, which not infrequently leads to bowing or actual deformation ot the cylinder with consequent material increase in engine friction and increased liability to excessive Wear, cutting, and even sticking of the piston.

According to my invention, I divide the cylinder jacket into a plurality ot' compartments, at ditterent levels, passing the water from the head jacket into one of these compartments and thence into another, so substantially equalizing the temperature of dit ferent parts of the cylinder.

The objects of my invention are to cool gas engine cylinders, particularly large horizontal or substantially horizontal engine cylinders, and the like, more efficiently, and to avoid uneven heating of the different sides oit the cylinder and consequent distortion.

I will now proceed to describe my invention with reference to the accompanying' drawings and will then point out the novel features in claims.

n the drawings: Figure 1 shows a central vertical longitudinal section ot' the cylinder and associated parts 0f a horizontal type gas engine, having a head jacket and a twopart cylinder jacket connected as above described. Fig. 2 shows a transverse section ot said cylinder.

lin the drawings, 15 designates the engine cylinder, 1G the cylinder' head, 17 the piston, 18 the connecting rod, 19 the head jacket, 2O the adniission port thereot, and 21 the discharge port thercoi.

22 and Q3 designate lower and upper compartments into which the cylinder jacket is divided by horizontal ribs 211i; Q5 designates a duct connecting said discharge portQl ot the head jacket with the admission port 2G ot the upper compartment 23 ot the cylinder jacket, and Q7 designates a duct connecting the discharge port ot compartment 23, such discharge port being located, at the top ot' compartment E23, with the admission port of compartment Q2; the admission port ot compartment 22 being located at the bottom of such compartment.

Q8 designates the discharge port of the com partment 22.

The admission port of con'ipartment Q3, besides being located at about the bottom of that compartn'icnt, is located near one end ot that compartment, preferably the head end, as shown, while the discharge port of compartment 22% is located near the opposite end oi that compartment QB. The admission port and discharge port of compartment 22 are located at opposite ends ot.' that compartmcnt.

lt. will be seen that cooling` water passes first through the head jacket 1S) into the lower portion ot the upper (.:ompartment 2? of the cylinder jacket. and thence passes through compartment 23 to the upper portion thereof, and thence through duct Q7 into the lower portion ot compartment Q3 and through compartnient 2i? to the opposite end ther-cot, and thence out. ln general, water will be circulated positively through these jackets either by means ot a pump, or as a result ot the water being discharged at lower pressure than that at which it is rcceived. l dojnot illustrate such means for positive circulation, as they are well known.

The head ot the engine cylinder is naturally the part exposed to the greatest heat, and it will be observed that it is into the jacket of this part that the cooling water First enters. ln large horizontal engines, wherein the cylinder jacket is one compartment only, it frequently happens that the water in the lower portion of this jacket is materially cooler than the water in the upper portion ci such acket, due to the natural tendency of warm water to rise and colder water to descend. The result of this is that the lower' portion of the cylinder is maintained at a lower temperature than the upper portion of the cylinder. According to my invention this uneven heating of the engine cylinder, which, it it occurs, frequently leads to warping, is obviated, in that the water is discharged from the head jacket into the upper compartment 23 of the cylinder jacket, and thence from the compartment 23 into the compartment 22 of the cylinder jacket. The hottest portion of the cylinder wall included within compartment 22 is therefore closely adjacent to the coldest part of the cylinder wall included within jacket 23; and since these parts are so closely adjacent, the flow of heat through the walls of the cylinder keeps these parts at nearly the same temperature. Furthermore, since the water from the upper portion of compartment passes directly into the lower compartment 22, the temperature of the lower portion ofthe cylinder wall is kept at practically the same temperature as the upper portion or' the cylinder wall.

The connection of the upper portion of the head jacket to one or' the compartments oi" the cylinder acket obviates the pocketing of steam in the head jacket; and the connection oit the upper portion of the compartment 23 of the cylinder jacket to compartment 22 of that jacket, obviates pocketing of steam in compartment 23; while the connection ol the upper portion of compartment 22 to the discharge 28 obviatcs pocketing of steam in compartment v22.

This application is a division of my application Serial No. 435,779, tiled May 29, 1908.

llVhat l claim is l. ri. jacketed engine cylinder having a head jacket and having also a cylinder jacket surrounding the cylinder only and divided into a plurality of compartments arranged at dillerent levels, means for connecting the head jacket to one of said cylinder jacket compartments, and means for connecting one such cylinder jacket compartment to another cylinder jacket compartment.

2. A jacketed engine cylinder having a head jacket and having also a cylinder jacket surrounding the cylinder only and divided into a plurality of compartments arranged at dilierent levels, means connecting the head jacket to an upper compartment of the cylinder jacket, and means con.-

necting such compartment of the cylinder jacket to a lower compartment ot such cyl inder jacket.

3. A jacketed engine cylinder having a head jacket and having also a cylinder jacket surrounding the cylinder only and divided into a plurality of compartments arranged at diiierent levels, means connecting the head jacket to the lower portion of an Lipper compartment oit the cylinder acket, and means connecting the upper portion or' such compartment of the cylinder jacket to the lower portion of a lower compartment of such cylinder jacket.

4l. A substantially horizontal engine cylinder comprising a head jacket and a cylinder jacket, the latter divided horizontally into a plurality of compartments arranged at different levels, means connecting` the head jacket to an upper compartment voit the cylinder jacket, and means connectingl such upper portion ofthe cylinder jacket to a lower compartment of thecylinder acket.

5. A substantially horizontal engine cylinder comprising a head jacket and a cylinder jacket, the latter dividedv horizontally into a plurality of compartments arranged at diiierent levels, means connecting said head jacket to the lower portion of an upper cylinder jacket compartment, near one end of that compartment, and means connecting the upper portion of' such upper cylinder compartment at a point near the opposite end of such upper compartment, to the lower portion of a lower cylinder jacket compartment.

6. A substantially horizontal engine: cylinder, comprising an encirclingjacke't divided horizontally into a plurality of compartmcnts at different levels, an upper coinpartment having an inlet connection and means connecting such upper compartment to a lower compartment.

7. A. substantially horizontal engine cylinder, comprising an encircling jacket divided horizontally into a plurality of compartments, at different levels, an upper compartment having near its bottom and' near one end an inlet connection, and means connecting the upper portion of such upper compartment, at a point near-the opposite` endy of such upper compartment, to the lower portion of a lowerv compartment, such lower compartment having near its top a discharge connection.

ln testimony whereof,l I have signed this specification in the presence of two subscribing witnesses.

EDVARD RATHBUN. `Witnessesr H. M. MARBLE, E. S. Ross.

Copies of this patent'may be obtained for five cents each,iby addressing the i Commissionerof Patents, l Washington, D. G. 

